Adjustable screw-in post support



FIG. 1 is a top perspective view of my adjustable screw-in post support;

FIG. 2 is a front elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof. 

The ornamental design for an adjustable screw-in post support, as shown and described. 